Presentation on theme: "Warm-ups Date: Jan 29, 2014 Page: Table of Contents p 1 W.O.D: Last 5 pages Warm-ups: Front Cover W.O.D. Threshold – the minimum level of an impulse needed."— Presentation transcript:
Warm-ups Date: Jan 29, 2014 Page: Table of Contents p 1 W.O.D: Last 5 pages Warm-ups: Front Cover W.O.D. Threshold – the minimum level of an impulse needed to activate a neuron. Question: How are nerve impulses like dominoes? Glossary
Today’s Plan Warm-up Introduce our speaker Pushing the limits video Grades – Get signed! Reflect
Anat & Phys Table of Contents (p. 1) Your Brain & Your Nervous Systemp. 2 Brain Notes/Find someone who…p. 3 Brain Hemisphere Dominancep. 4 The Secrets of the Brain Videop. 5 Neuron Drawingp. 6 Textbook Reading (p )p. 7 Senses/Stimuli gamep. 8 Reflex notesp. 9 Reaction Vs. Reflex lab/Pre-Labp. 10 Human body: Pushing the Limitsp. 11 Muscle Reading/?’s Text p. 12 Muscles under the Microscope (+ Muscle Reading) p. 13 Muscle Notes/Muscle Fatigue labp. 14 Pushing the Limits Video/Action Potentialp.15
Action potential of muscles
Ions (charge elements) build up until Na+ (sodium) gathers outside the membrane K+ (Potassium) gathers inside the membrane A signal from another nerve opens the channels, and the Na+ rushes in. K+ rushes out. This repeats jumping down the nerves. At the end of the nerve, Acetylcholine has been building up. When the impulse reaches the neuromuscular junction, Acetylcholine channels are open, allowing it to rush out and trigger a muscle contraction.
Reflection: Would you consider working for Youth Outdoors?